Oil-well pump



I. H. NICHOLS.

0|L WELL PUMP.

APPLICATION FILED APR. 2,1921. RENEWED FEB. 27| 1922.

Patented May 30, 1922.

SI1/puente@ @How ad o UNITED STATES JOHN H. NICHOLS, OF OILFIELDS, CALIFORNIA.

OIL-WELL Specication of Letters Patent. Patented lvldy 30, 1922 Application led Aprilv 7, 1921, Serial No. 459,401. Renewed February 27, 1922. Serial No. 539,752.

fields, in the county of Fresno and State of California, have invented certain newand useful Improvements in Oil-Well Pumps; and I do declare the following tobe a full, clear, and exact Adescription of the invention, such as will enable others-skilled in the art to which it apperta'ins to make and use the same.

This invention relates to an improved oil well pump and one object of the invention is to provide a pump in which the standing valve and cylinder can be withdrawn from the well tubing by means of the sucker rod and plunger thus making it unnecessary to pull the tubing when it is desired to remove -the standing valve and cylinder.

Another object of the invention is to provide improved means for engaging an extension of the standing valve so that ordinarily the movement of the sucker'rod and plunger will not cause the standing valve and cylinder to work loose. l

Another object ofthe invention is to so construct the device that an enlargement formed upon the extension of the standing valve may pass easily between spring clutch strips carried by the lower portion of the tubing, the spring clutch strips then e'ngag` ing the upper end portion of the enlargement to hold the standing valve and cylinder against accidental displacement but permits of their removal through the medium of the sucker rod and plunger when desired.

Anotherobject of the invention is to so construct this 1pump that the standing valve may have wor ing engagement with a valve seat serving to'suprtthestanding valve andA cylinder and further serving as means to iill the space between the lower portion of the standing valve and the walls of the tubing. I

Another object of the invention is to pro- `.vide an improved type ofy adjustableveollar positioned in the tubing about the upper portion of the cylinder, the adjustable collar being provided with passages through which oil may pass into the. space between the cylinder and the well tubing.

This invention is illustrated in the accompanying drawings, whereln:

Figure 1 is a verticalsectional view through the improved 1pump.

Figure 2 is a view s owing the well tubing and cylinder in vertical section, the standing valve, sucker rod, and plunger being shown in elevation.

Figure 3 is a transverse sectionall view taken along the line 3-3 of Fig. 1.

The well tubing or casing is formed in sections and will include a section 1 con' neoted with an upper section 2 by means of a coupling 3 and connected with a lower section 4 by `means of a coupling 5. The

coupling 3 is provided with an internal thickened portion forming an adjusting collar 6 provided with grooves 7 so thatoil in the section2 of the tubing may pass through these grooves intothe space between the section 1 and cylinder 8. The coupling 5is also internally thickened to provide a downwardly tapering valve seat 9- for receiving the tapered lower portion 10 of the standing valve 11. This standing valve has the cylinder 8 in threaded engagement therewith so that the standing valve is partly positioned within the cylinder. The tapered lower portion of the standing valve extends through the valve seat 9 and carries a depending tubular extension 12 provided intermediate its length with an outstanding shoulder 13. This shoulder 13 tapers downwardly so that it may pass easily between the resilient anchoring strips or dogs 14 secured to the lower tube section 4 and has its upper end extending abruptly toward the tube 12. It will thus be seen that when the standing valve and cylinder are' lowered into the well4 casing or tube, the downwardly tapered shoulder 13 may readily force its way between the resilient strips 14. The hookshapedvupper end portions of the strips 14 willI grip the upper portion of this shoulder and will thus serve to securely but releasably hold the standing valve and cylinder in place with the tapered lower portion of the valve seated in the tapered valve seat 9. A lift nut 15 is carried by the upper end of. the cylinder 8 and will be of such internal diameter that while it may lit loosely about the sucker rod 16, it will prevent the plunger 17 from. moving out of the cylinder. Therefore, when the sucker rod and plunger are drawn upwardlyv for-removal from the-well, the plunger will strike the inner end ofthe lift nut 15 and continued upward movementA firstI be placed upon the sucker rod and after the plunger 17 has been connected with the sucker rod, the plunger will be inserted into the cylinder 8 and the lift nut screwed tightly into engagement with the upper end portion of the cylinder. The sucker rod is lowered into the well casing or tubing and as the tapered portion 10 of the standing valve moves into engagement with the valve seat 9, the shoulder 13 will be gripped b y the resilient strips or dogs 14. The pump can then be operated in the usual manner with the plunger reciprocating in the cylinder Without striking thev standing valve or lift nut. When it is desired to remove the cylinder and standing valve from the well for cleaning or repair purposes, it is simply necessary to draw the sucker` rod upwardly and out of the well. As the sucker rod moves upwardly, the upper end of the plunger will engage the lift nut and the cylinder and standing valve will be carried upwardly and out of the well. When the standing valve moves upwardly off the valve seat, oil in the well tube or casing can pass down out of the casing or tubing into the lower portion 0f the well. This will permit of the sucker rod, plunger, cylinder, and standing valve being withdrawn without excessive elort Itnwill thus be seen that there has been provided a pump in whichtheI cylinder andA heldin the standing valvel will be normally y ut in which proper position for pumping,

the pump is so constructed that the cylinder and standing valve may be easily and quickly removed for cleaning and repair without it' being necessary to pull the tubing.

l. In an oil well, a tubing, a sucker rod in the' tubing, a plunger carried by the sucker rod, a cylinder and standing valve removablyV seated in the tubing, an anchoring element' carried byv and extending beneath the standing valve, resilient means carried Aby said tubing for enga ing Said anchoring element tov releasablyold the cylinder and standing valve in place, and means carried by the cylinder engageable by the plunger whereby the cylinder and standing valve may be released from the gripping means and drawn out of a well with the sucker rod and valve.

2. In an oil well, a tubing, a standingvalve, a cylinder carried by the valve, a seat supporting the valve in the tubing and forming a filler for space between the valve and tubing, the standing vvalve being provided with a tubular lower extension extending beneath the seat and having an annular shoulder intermediate' its length tapering downwardly from its upper end, spring strips carried by the tubing and having their free end portions extending for engaging the upper end of the shoulder, a sucker rod,

a plunger carried by the sucker rod within the cylinder, and means carried by the cylinder vengageable by the plunger for drawing the cylinder and standing valve out of the tubing with lthe sucker rod and plunger.

' 3. In an oil well, a tubinghaving an internal valve seat, a standing valve supported for removal'in the tubing upon said valve seat and having a tubular'lower extension extending beneath the valve seau/gripping means carried by the tubing beneath the valve seat for engaging the tubular extension to releasably hold the standing valve `in place, a cylinder carried byJ the valve extending upwardly in the tubing, `a sucker rod extending through the tubing into the cylinder, a plunger carried by the Sucker rod within the cylinder, and a lifting nut carried by the cylinder for engagement by the plunger to lift the cylinder and standin valve out of the well with the sucker rod an plunger.

4. In an oil well, a tubing having an annular internal seat adjacent its lower end, resilient gripping means in the tubing below the seat, a sucker rod extending down into the tubing, a plunger carried by the sucker rod, a cylinder fitting in the tubing withy the plunger positioned in the cylinder,

vfor the standing valve provided with an outstanding shoulder for engagement by the resilient gripping means to releasably hold the cylinder in a set position with the plunger movable longitudinally in the cylinder.

In testimony whereof I have hereunto set my hand.

' JOHN H, menons. 

